Question

The coin shown weighs 1.5 grams per squarecentimeterIF the diameter of the coin is 2 centimeters, what isthe approximate weight of the coin in grams?

Answer 1

First, we have to find the area of the coin.

Area of a circle = π r^2

Where:

r= radius = diameter /2 = 2 /2 = 1 cm

Replacing:

A = π (1)^2 = 3.14 cm2

Now, multiply the weight per square centimeter (1.5 grams ) by the area:

Weigth : 1.5 x 3.14 = 4.71 grams